Been using Toxicroak for about a day now, got rid of a Dragonite (which was replacing a Gliscor). Best move I've ever made. Hard counters the typical "lol4SwiftSwimPokemon" Rain teams, fucks up Tyranitar with Drain Punch, and Hippowdon is taking >50% from from +2 Drain Punch, and if it Earthquakes, anything on my team OHKOs it, and even if it Roars, ANYTHING STILL OHKOS IT ON MY TEAM.
You're right about everyone going "lolToxicroak" though. Seriously, every time I've brought it out, people literally stop the battle to go "lol, Toxicroak", and then they get swept.
What set do you run on yours?